Weft-severing device for automatic looms.



A. IMBACH.

WEFT SEVERING DEVICE FOR AUTOMATIC LOOMS.

APPLICATION FILED MAYM, 1915.

1,157,897. Patented Oct. 19, 1915.

Fig. I.

/VvE/vToR AUGUST IMBACH ATTORNEY COLUMBIA FLANOGRAPH COHWASHINGTON, b. c.

, UNITED smrns AUGUST IMBACH, or A-n EN-aIEn-asiivGEN, BADEN, GERMANY.

' .WEFT-LSEVERING DEVICE FOR AUTOMATIC LOOMS.

i'b a'l'l wh om it may concern:

Beiit known that 1, AUGUST imien, a

:citi z'en er the Swiss Repebnq andresi ent. v of 'Arlen-Riela'singen, V Baden, G'ermany, V havfiiivented new and usefullmproveinents f in Weft-sev ring Device-is rer' Automatic Learns, of v'vhiehthe renewing is a full,

clear, and exact speeificatiea; j r

This invention relates to improvements in were severing devices for automatie looms. I The known devices fer cutting theweft thread ends on bobbin changin in auto-v ,inatic' learn possess the disadvantages that they easily become dis la d iaoperation "and only work efiliently wlijntliey receive ttentie' ever day, that Ithe "thread ends rem ining en the elothiareror the most part 'reiatively l ng, and further, thattlie wear of the individual pafts ltoorapid so that the tip-keep is very costly. Te obviate these disadvantages it has alreadj been preposed,

I instead v,ofeutt'lingfftl'lroiigll the thread, to

. sever it bymeahs it This ham-c iheriii'g o'fthe thread can on y result in complete severance f'wh'e'n ibis-effected suddenly with If the is (3611-.

trolled in dependence penflthe batteries, in

the ,t'reposed manner, that; isto sa ,jse that it'strikes'the anvil when the batten changes its direction gof movement afid eeasequeauy,

the, velocity er the latter 'isjapp'roxistat ly-m1,teatimest fweakaiidslow that *pei' d'ent ripen the battei but jthe-said" strongly built hammer together with the aa- .tli were, thread, which itself, 501%, is irequently not severed. The device accordto this invention obviates this disadvantage In this; ease the; control of the threa' severing hammer is also partially de- (i1 is shot award by a springgtension mechanism and the hammer is brought hard against theaiivil, the said mechanism; for the :fi'iistmove'ment of the -ha'mine1-. ,ana an "viLb released by the bobbin changing spring tension-mech n1sm .1s

.t as ha 0n withshair advantage, s'raee at efiic ent save" i lt hrad rendered possible it this re.

' 'rhe "thread severin is preferably Specifiation of Letters Patent.

Apiiiiation filed May 14-, 1915. Serial No. 28,007:

' 1 The proper thread Patented Oct. 1%, 1915.

'chamfer'edor beveled at the head in such a manner that its thread cutting'edge lies as near as possible tothe edge of the cloth s0 "thatthe thread is separated immediately at thesaid edge.

The drawing lllustrates one form of coni struc'tion according to the invention.

F gures l-and 2 show vthe hammer in the 7 position of rest, Fig. 1 being partially a side elevation, partlya vertical section and Fig.

2 a front view; Fig; 3 illustrates by a simia,

lar view to thatof Fig.1 the hammer in the position in which the thread is struck, and Figs. 4, 5 and 6 are side elevations of a form of releasing mechanism for the usual operationfof the haininerin different positions of the parts, said side elevation being taken f'roin the"oppositeside to that of Figs, 1

The whole device is fitted to a carrier 3 which is secured to the temple carrier ,4.- The temple 5 itself is likewise screwed to the carrier 3.

severing device consists of twop'arts, that is'to say, the slide 1 ad- '.j 'u's'table relatively to the loom batten and the hammer 2' which is pivoted upon the said "slide and is strongly constructed; 'The said slide 1 is retained in-its withdrawn position or position of'rest by the, engagement of a pin 7jseci1 red t0 itwith alatch 8 which is pivotally mounted in the carrier 3 (Fig. 4). In the operation of bobbin changing, the latch 8 is raised inthe known manneran'd the pivot 1070 1, the slide, by reason of the special term or a slot ll-it'ormed therein and fin'fvv'hiehthere engages a pin 12' secured to the-earrierB, is driven downward with con-V 'stdei-abiefgveloeit The threadis thus sev- "e'red the resulting blow of the hammer upon theanviI The strongly constructed amme s is so beveled at its broad head end (Fig. 2) that itsthread severing: edge it lies "as near as'po'ssible to theed'g'e of "the fabric, whereby the thread is severed quite close to the'said fabric edge. In its return movement toward the breast beam the batten 16 brings the-slide l with the hammer- 2 back into'its original position by means of I the adjustable stop 17, whereby the hammer 2 is again raised. By a further device described below the latch 8 is first prevented from retaining the slide 1, so that the latter on thelchange of direction of motion of the batten is again shot forward and 'conse-.

quently strikes the end of the 'weftfthr'ead of. the new spool in the described manner. I The batten subsequently brings the slide again into the initial positionQwher-e this now Ire-- 'tainedb'y the latch 8.

a Fig. 4 shows thereleasingmechanism"for' the hammer 111- the posltlon of rest in which it is vretained by means of; tl1e'.-pin-7Iof; the

slide 1 through the medium of the la,t ch ,8. At the beginning of the operationv of bobbin" V exchanging.afsmall' rodf18 is raised'bv means of ai 'svstem'of levers (not shown) The collar 20'secured upon the said smallrod then lifts the latch 8, withiwhichit engages at B to suchan extent thatits notch 22 releases the pin 7, the result of which is, tha t. -the slide above described is shot in front of the batten and the hammer can sever "the rte- 1 inainderof the weft threadvf i r By this means the paw li23. on the first return of the slide; prevents thelatchiS, from wdroppinz to .lock the pin f7. bvthe".'en'gagenent of its" notch, 22 (with the; said; pin. The slide thus remains unlocked ;and can again move toward-thef-batten so. that the hammer can for. the second time strike the thread, in this) case the end of-the Weft thread of the new bobbin. On thefirstfreturn the slide I, the impact of; its pin 'Tagainst the; nose 23 lo'f jtheflpawl '23, has I 'brought the latter into such a'position 'that; 5 its pinQG no -lie s withiji' r'e'a'ch of the stop 21 of'the lever 21 -'('Fig.6). The latter latch, 8 can drop on to the pin 7 whereby its notch 22,- on the second return of the slide,

@The latch ,8 carries a pawl. 23:: pivoted engages with the said pin and locks the slide. The device is thus again in the position of rest.

"WhatIcla'imis': h V

1. In automatic looms,-a device for severing weft thread endslon bobbin exchange, s r si e a th ead s vering hammer, movable carrierffor said hammer, an anvil on said;'carriergopposite to said hammer. a .springtension mechanism for rapidly shifting forward said carrier with'rits' hammer and anv'ih lme'ans for striking the hammer uponthe anvilon the-shifting or operative v 1 movement of the carrier, locking means for i retaining the carrier" in, a "position ;of-rest .a'ndi releasing means under the control of the. bobbin exchange; tof i lease saidllocking means for ,a firstgonerative movement of the icarrierand tomaintain"said'locking means 1 i releasedior a secondioperative movement of 8 the carrie ,"substantially asfdejsc ib cla j r 2. In automaticloomsfadevice for sever- V ingjweft threadends 'onfbobbi'nexchange,; comprising ,fa thread' severing hammer, fan";

@- anvil opposite tosaid hammer; a spri'ng'tension operating mechanism f orfstri'king the hammer upon the;anv1l, {controlling means under :thel control of the bobbin exchange to set 'saidjoperating' mechanism into opera-[ 7 tion bobbin lexchan 2e; said-hammer hav- .95

mg a ad awed-h a nd arr nge I i 1 astofl have its thread severingfedg'eflimmeai tel .jnproximitv ofthe'fabricfedge; sub- 5 stantiallylas described. l I H V v '3. In automatic looms,;a device 'foriseven i112: w r a e ds .0 bobb n ,e c 2 comprisi'ngfa thread severjnghammerwith' a' broad beveledjheafd'end'havin gf-itsithread t r ngf d e; Clo e biithel iabric s a," Y

I [on said carrieroppos'ite tosaid hammerga movable carrier for saicl'fhammer, an anvil spring tensi on mechanism for ra idlv shift;-

ing'fforward said carrier with its hammerl 1 andanviljjmeansforstriking the .hammer 'upon the-anvil on the shifting" or operative l novement of'the carrier-flocking means'for retainin the carrier in afposition 'of' rest 'and 'r'eleasingmeansunderlthecontroljof I f,thej ,b0bb1n xch n e, toreleasersald"locking. 1 15 1 t Ear r;afidjitogimeiet Said ocking m ans rel sed forasecqn opera ive. more m an g ofi i rstyb, ratire..m vement;iof-

; 4. *In fautomatic Blooms eV ice for sever l awe ft rsa fe s. .i nbbinfexeh n'ge,

comprising a hread'fjseveringfl-hammer, ,ia i

v therefore, on the second; operationof the;

slide, holdsback the" pawl 23 andfthe pin- 7 can slideforward under thesaidpawl -23. inorder to assume, relativelv with thelatw l ter, the position shown in Fig. 6; so that the for said hammer; anvil I aid'lcarrieri oppositeto "saidjrjhammenfika i :t'

i112 d W'a dis id rr er w t 'itsi' ainm'er'. and'fanvilsmeans' forfstrikinglthehammer 1 1 a upon theanvil on-the fshijfting o o tive 1 moveme f h eui i is a n Pin O I f j the latter,' a latch for engaging-with said l so;

pin to retain the carrier in a position of rest, means under the control of the bobbin exchange for disengaging said latch, a

spring actuated pawl combined with said latch for preventing the latter from operative engagement with said locking pin on the first return movement of the carrier to subsequently allow of .a second forward movement thereof, and means for rendering said pawl inoperative on'the second forward movement of the carrier to allow the latch Copies of this patent may be obtained for to take again its operative locking position relatively to the pin ofthe carrier in order to lock the latter after its second return movement, substantially as described.

In witness whereof I have hereunto signed my. name this 24th day of April 1915, in the presence of two subscribing witnesses.

AUGUST IMBAGH.

Witnesses:

ARNOLD ZUBER, AMAND BITTER.

five cents each, by addressing the "Commissioner of Patents, Washington, D. 0. 1 

